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elang
Member
I have a game in which I have to split the sprite in run time, I am trying to get the exact position of projectile using update function on double tap like this
CGPoint pos = nextProjectile.position;
but when I initilize new sprite for this location the new sprites are not initialized form the exact location instead it initiating form starting position.
elang
Member
here is my code:-
i tapped the screen in middle. [(for example) then projectile position x=225 y=180]
- (void)update:(ccTime)dt {
if (numTaps==2) {
nextProjectile1 = [[CCSprite spriteWithFile:@"Weapon_Bucket_v4-1.png"] retain];
nextProjectile1.position = ccp(nextProjectile.position.x,nextProjectile.position.y);
nextProjectile2 = [[CCSprite spriteWithFile:@"Weapon_Bucket_v4-1.png"] retain];
nextProjectile2.position = ccp(nextProjectile.position.x,nextProjectile.position.y);
[self addChild:nextProjectile1];
[self addChild:nextProjectile2];
[nextProjectile1 runAction:[CCSequence actions: (heres my projectile actions) , nil]];
[nextProjectile2 runAction:[CCSequence actions: (heres my projectile actions) , nil]];
}
}
- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
numTaps = [[touches anyObject] tapCount];
printf("Tapcount : %d",numTaps);
nextProjectile = [[CCSprite spriteWithFile:@"Weapon_Bucket_v4-1.png"] retain];
nextProjectile.position = ccp(0,0);
[nextProjectile runAction:[CCSequence actions: (heres my projectile actions) , nil]];
}
Benihana
Member
I don't see any problems, but I'm not certain I follow what the problem is. My best guess is that you want the projectile at the touch, not at 0,0. In that case you need to change nextProjectile.position = ccp(0,0); to something like
UITouch *thisTouch = [touches anyObject];
nextProjectile.position = [thisTouch locationInView:[thisTouch view]];Please put your code in backticks (`) to make it more readable. This isn't the first time you've been asked to do so.
You also have some other issues with your code, such as the retain calls for nextProjectile 1 and 2. If update is called more than once, you'll no longer have a pointer to the projectiles you created the first time, but they'll still have a retain count of 1, so they'll be leaked.
elang
Member
ok thanks for your reply.
i think you not clear what am asking. or am not posted correctly. i don't know.
anyway, refer below link:-
-
| Get the Flash Video |
see the above link from 0.25 sec , how they split the object in to three same as i want.
elang
Member
@Benihana,
when my first projectile travelling in trajectory path, then am tapped when half the way of the projectile. here am calculating the projectile position in update function and asisgned to other two projectile but it starts from (0,0).
were am wrong. anyone correct me.
why it starts from (0,0).
@xozyain,
this is not the suitable place for ask this question.
@xozyain it's been posted by Rovio (the creators of angry birds) so it may have been captured via the simulator using something like iShowU HD. That's what I use anyway.
@srinivas87 Have you CCLOG'ed the position you're getting back in the update function after the double tap, check it's not getting reset after the first touch of the double tap.
elang
Member
already posted above sample code of initialising next projectile. for your refrence again i paste the above code.
- (void)update:(ccTime)dt {
if (numTaps==2) {
nextProjectile1 = [CCSprite spriteWithFile:@"Weapon_Bucket_v4-1.png"] ;
nextProjectile1.position = ccp(nextProjectile.position.x,nextProjectile.position.y);
nextProjectile2 = [CCSprite spriteWithFile:@"Weapon_Bucket_v4-1.png"] ;
nextProjectile2.position = ccp(nextProjectile.position.x,nextProjectile.position.y);
[self addChild:nextProjectile1];
[self addChild:nextProjectile2];
[nextProjectile1 runAction:[CCSequence actions: (heres my projectile actions) , nil]];
[nextProjectile2 runAction:[CCSequence actions: (heres my projectile actions) , nil]];
}
}
- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
numTaps = [[touches anyObject] tapCount];
printf("Tapcount : %d",numTaps);
nextProjectile = [CCSprite spriteWithFile:@"Weapon_Bucket_v4-1.png"];
nextProjectile.position = ccp(0,0);
[nextProjectile runAction:[CCSequence actions: (heres my projectile actions) , nil]];
}
dcthatch
Member
erm, don't you need to convert the CGPoint to gl?
CGPoint finalPoint = [[CCDirector sharedDirector] convertToGL:nextProjectile.position];
forgive me if this has been mentioned, i do not have time to properly read this, but i did a cmd-f for gl, and found nothing, so i assumed that it wasnt
hope it helps
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